These screening measures have led to a decline in breast cancer mortality; however, 1 in 39 women will ultimately die from this diagnosis.1 Most breast cancers express the estrogen receptor (ER) and/or the progesterone receptor (PR) and do not express the human epidermal growth factor receptor 2 (HER2) across all races/ethnicities. The gene discussed is ERBB2; the disease is breast carcinoma.